.back-ground{
    width: 1236px;
    height: 838px;
    background-color: #000000;
    margin: auto;
}
/* 头部 */
header{
    background-image: url(../images/top-bg.gif);
    width: 1000px;
    height: 405px;
    margin: auto;
}
header>ul{
    display: flex;
    width: 900px;
    height: 30px;
    font-size: 18px;
    color: #ffffff;
    font-weight: bold;
    position: relative;
    left: 420px;
}
a:hover{
    color: #c50000;
}
header>ul>a>li{
    margin-left: 20px;
    margin-top: 34px;
}
header>img{
    position: absolute;
}
header>img:nth-of-type(4){
    right:300px;
    top: 80px;
}
header>img:nth-of-type(3){
    right:550px;
    top: 80px;
}
header>img:nth-of-type(2){
    right:780px;
    top: 80px;
}
header>img:nth-of-type(1){
    top:3px;
}
header>h1,header>p{
    color: white;
    position: relative;
    top: 230px;
    margin-left: 35px;
}
header>h1{
    font-size: 25px;
    font-weight: bold;
}
header>p{
    font-size: 12px;
    width: 950px;
    margin-top: 10px;
}
/* article */
.clearfix::before,.clearfix::after{
    content: "";
    display: table;
    clear: both;
}
.article{
    width: 1000px;
    height: 293px;
    margin: auto;
    background-image: url(../images/cont-box-top.gif);
    color: white;
    position: relative;
}
.article>h1{
    font-size: 25px;
    font-weight: bold;
    margin-top: 50px;
}
.article>div{
    margin-top: 10px;
}
.article>h1,.article>div{
    margin-left: 35px;
}
.article>div{
    display: flex;
}
.article>div>div>h2{
    font-size: 18px;
    font-weight: bold;
    margin-left: 15px;
}
.article>div>div>p{
    font-size: 12px;
    width: 456px;
    margin-left: 15px;
}
.article>img{
    position: absolute;
    top: -10px;
    left: 570px;
}
/* 脚部 */
footer{
    background-image: url(../images/bottom-bg.gif);
    width: 1000px;
    height: 93px;
    margin: auto;
    display: flex;
}
footer>p{
    color: white;
    font-size: 12px;
    margin-top: 100px;
}
footer>p:nth-child(1){
    margin-left: 30px;
}
footer>p:nth-child(2){
    margin-left: 120px;
}
footer>p>span{
    text-decoration: underline;
}